A daughter circuit board of an electronically commutated motor for interface signal conversion, having circuit units integrated on the daughter circuit and eight ports for communicating with a control system of a user terminal, the daughter circuit board being plugged into a motor controller for signal conversion so that the motor controller communicates with the control system of the user terminal. The eight ports include an input port of power supply, a port of mode selection, a signal port of PWM, a R/T port for data transmission between the daughter circuit board and the control system of the user terminal, a port of COM, a port for fault signal output, a port of power indication, and a port of speed feedback. The daughter circuit board is simple, easy to correspond with various control systems of user terminals, and accords to the latest electric standard thereby facilitating management and popularization.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A daughter circuit board for interface signal conversion, comprising: a) a plurality of circuit units integrated on the daughter circuit board; and b) eight ports for communicating with a control system of a user terminal; wherein said eight ports comprise: M 1 : an input port of power supply, 10-35 V DC; M 2 : a port of mode selection, which inputs signals to the daughter circuit board and employs a torque mode at low level and a speed mode at high level; M 3 : a signal port of pulse width modulation (PWM), which inputs PWM signals having a frequency to the daughter circuit board, and the signals are rotary speed/torque control command of a motor; M 4 : a R/T port for data transmission between the daughter circuit board and the control system of the user terminal, in which a bidirectional asynchronous half-duplex communication data line is employed, and voltage direct current is employed at high level and signal ground is employed at low level; M 5 : a port of component object mode, which is a ground line of signal lines and a common terminal of control signals; M 6 : a port for fault signal output, through which the daughter circuit board outputs a fault signal to the control system of the user terminal under error state, and the motor is under error state at high level, and under normal state at low level; M 7 : a port of power indication, through which the daughter circuit board outputs PMW power signals to the control system of the user terminal using an open collector; the power is calculated by duty cycle of PWM; and M 8 : a port of speed feedback, through which the daughter circuit board outputs speed signals to the control system of the user terminal using the open collector; the speed signal is calculated based on output pulse number per rotation.
2. The daughter circuit board of claim 1 , wherein a voltage of the port of mode selection is 24 V.
3. The daughter circuit board of claim 1 , wherein said signal port of PWM comprises 60-100 HZ of PWM signal and has a voltage of 24 V.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
November 30, 2011
February 11, 2014
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